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Spessartine crystals - click for larger pic
Spessartine crystals
Photo by Violet Anderson
© Royal Ontario Museum

Spessartine crystals - click for larger pic
Spessartine crystals
© Bill Lechner

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Home > Mineral Descriptions > Spessartine - (2 Photos)



Spessartine
Mn3Al2(SiO4)3

     Spessartine, a member of the garnet group, is a rare mineral at Mont Saint-Hilaire.

PHYSICAL CHARACTERISTICS:

Color is usually beige to brown.
Luster is vitreous to adamantine.
Diaphaneity is transparent to opaque.
Crystal System is isometric; Ia3d.
Crystal Habits include embedded crude rounded crystals to 5mm.
Cleavage none observed.
Fracture is subconchoidal.
Hardness is 7 - 7.5
Specific Gravity is approximately 4.2 g/cm3.
Streak is white.
Associated Minerals include albite, arsenopyrite, pyrite and pyrrhotite.
Distinguishing Features: Crystal habit and luster.
Origin: Named in 1832 after its discovery locality, in the Spessart region,
   northwest Bavaria, Germany.

CLASSIFICATION:

Dana System
# 51.4.3a.3

Strunz Classification
# VIII/A.08-30

REFERENCES:
MinRec 21:339 (1990), Dana 8:1041-1043 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
--

MX
--

SS
--

MC
--

HF
¤¤

BR
--

SX
--

FR
--

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